Mat Type Foundation

Mat foundation also known as a raft foundation or floating foundation is a way of giving extra support to a building.

Mat type foundation.

In a raft the entire basement floor slab acts as the foundation. We would like to show you a description here but the site won t allow us. The condition of the soil. Types of foundations or footings.

The categorization of the mat foundations is made based on the modifications made to the flat plate. 8 types of the foundation footing are used in. One reason is if the soil on which the building is constructed does not have a bearing capacity. Raft or mat foundation the use of mat foundation is for columns and walls foundations where the loads from the structure on columns and walls are very high.

This type of foundation is suitable for loose soil. The type of foundation required depends on many variables. Since this soil is not able to support the building on its own a mat foundation is built. A mat foundation is used when the subsoil is weak and column loads are so heavy that the conventional spread footings cover more than 50 of the building area.

It is called a raft because the building is like a vessel that floats in a sea of soil. The depth of the raft foundation is manly increased at column positions to carry the high bending moments and shear forces. It is common to use mat foundation or deep basements to transfer the column loads to the underlying soil as well as provide floor slab for the basement. Therefore an engineer designing a building with a basement will tend to choose a raft foundation over other types of foundations.

The load applied from structure to the foundation. In the cellular mat foundation the structures of boxes are formed and walls of every box act as beams. It is also termed as a box mat foundation. The walls are connected by slabs at the top and bottom.

Factors on which footing types depends are bearing capacity of the soil. Raft foundations also called mat foundations are most often used when basements are to be constructed. There are many reasons why mat foundation is chosen by builders across the globe. Soil type building load and environment to name a few.

Raft or mat foundations are the types of foundation which are spread across the entire area of the building to support heavy structural loads from columns and walls. How to construct a raft or mat foundation a raft foundation is constructed by first excavating the ground to a uniform flat level. Additionally to the raft is made to improve the flexural stiffness of the foundation. Two common foundations that are for very different uses are mat foundations and pile foundations.

The depth of the soil at which safe bearing strata exists.